b Comae Berenices


The object was found in the following catalogues:
  1. The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version)

  2. SKY2000 - Master Star Catalog

  3. Smithsonian Astrophysical Observatory Star Catalog

  4. The Washington Visual Double Star Catalog, 1996.0


catalogues and names b Com, NSV 19648, 43 Com, HR 4983, HD 114710, SAO 82706, FK5: 492, WDS 13119+2753
constellation Coma Berenices

data from The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version) (Hoffleit+, 1991)


object is infrared source (NASA merged infrared catalogue, Schmitz et al., 1978)

position, motion, parallax:

position (J2000) RA: 13h 11min 52,4sec DEC: +27 52' 41''
position (J1900) RA: 13h 7min 12,4sec DEC: +28 23' 6''
proper motion (J2000) RA: -0,801 arcsec/a DEC: 0,882 arcsec/a
radial velocity 6 km/s
note: spectroscopic binaries
rotational velocity 6 km/s (uncertain) (variable)
trigonometric parallax 0,12 arcsec

magnitude

visual magnitude 4,26
(V on UBV Johnson system)

spectral / color information

spectral class F9.5V
B-V-magnitude 0,57
U-B-magnitude 0,07
R-I-magnitude 0,3

double/multiple star system information

separation 90,8 arcsec
mag difference (of double or brightest multiple) 5,8
note Worley (1978) update of the IDS
note (category: spectroscopic binaries): 5 or more yrs.? Visual companion is optical.

data from SKY2000 - Master Star Catalog (Myers+ 1997)

position, motion, parallax:

position (J2000) RA: 13h 11min 52,395sec DEC: +27 52' 41,4'' 0,06 arcsec source: 15
proper motion (J2000) RA: -0,0604 arcsec/a DEC: 0,882 arcsec/a source: 25
radial velocity 6 km/s source: 25
trigonometric parallax 0,12 0,012 arcsec source: 25
galactic coord. (B1950) longitude: 43,27 latitude: 85,4
GCI unit vector (J2000) X: -0,840832 Y: -0,272689 Z: 0,467593

magnitude:

visual 4,26 (observed) source: 25
photovisual 4,3 source: 2

spectral information:

spectral class G0 source: 96
Morgan-Keenan F9.5V source: 25
B-magnitude 4,83 0,05 B-V-magnitude 0,57
U-magnitude 4,9 0,05 U-B-magnitude 0,07

double/multiple star system information:

source of data: 19
separation between brightest and second brightest component 85,8 arcsec
magnitude difference between brightest and second brightest component 5,8
position angle 238

sources:

2 HD and HDE Catalogs
Cannon, A.J., and E.C. Pickering, Harvard Annals, Vols 91-99, 1918-24, Cambridge, Massachusetts: Harvard University; Cannon, A.J., Harvard Annals, Vol. 100, 1925-36, Cambridge, Massachusetts: Harvard University; and Cannon, A.J., and M. Walton Mayall, Harvard Annals, Vol. 112, 1949, Cambridge, Massachusetts: Harvard University
15 FK5, FK5 Extension and FK5 Supplement
Fricke, W., H. Schwan and T. Lederle, "Fifth Fundamental Catalogue (FK5), Part I. The Basic Fundamental Stars," Veroff. Astronomisches Recheninstitut, No. 32, Heidelberg, Germany, 1988, and Fricke, W., H. Schwan, and T.E. Corbin, "Fifth Fundamental Catalogue (FK5), Part II. The FK5 Extension," Veröff. Astronomisches Recheninstitut, No. 33, Heidelberg, Germany, 1991
19 WDS Catalog
Worley, C.E., and G.G. Douglass, Washington Catalog of Visual Double Stars 1996.0, United States Naval Observatory, 1996
25 Bright Star Catalogue, 5th edition
Hoffleit, D. and Warren, W.H. Jr., The Bright Star Catalogue, 5th Revised Edition, Version 2, 1994
96 SAO or HD/HDE Catalog
Reference from Value 1 or Reference from Value 2

data from Smithsonian Astrophysical Observatory Star Catalog (SAO Staff 1966; USNO, ADC 1990)

position and proper motion:

position (J1950) RA: 13h 9min 32,444sec DEC: +28 7' 52,02'' 0,004 arcsec
position (J2000) RA: 13h 11min 52,398sec DEC: +27 52' 41,37''
proper motion J1950 (FK4) RA: -0,0605 arcsec/a DEC: 0,879 arcsec/a 0,001 arcsec/a in RA
0,001 arcsec/a in DEC
proper motion J2000 (FK5) RA: -0,0604 arcsec/a DEC: 0,882 arcsec/a
source of proper motion data Determined by source catalog

magnitude:

visual 4,3 (accuracy: 2 decimals)
source of visual magnitude data Taken from the "Henry Draper Catalogue".

spectral information:

spectral class G0
source of spectral data Taken from the Henry Draper Catalogue or no spectrum in source catalog.

catalogues

source catalogue FK4, catalogue number: 492
Durchmusterung BD+28 2193
Boss General Catalogue 17874
Henry Draper Catalogue 114710

data from The Washington Visual Double Star Catalog, 1996.0 (Worley+, 1996)

position and proper motion:

position (J2000) RA: 13h 11,9min DEC: +27 53'
proper motion (J2000) RA: -0,801 arcsec/a DEC: 0,882 arcsec/a

double/multiple star system information:

component year number of measures position angle angular separation magnitude of 1st component magnitude of 2nd component spectral class(es) discoverer code
- 1851 6 279 130,2'' 4,26 10,1 G0V STT
1924 238 85,8''

discoverer information:

discoverer code discoverer reference
STT Struve, O.

notes:

note Beta Com. Possibly a long-period spectroscopic binary.